ExxonMobil began construction to a third crude unit at its refinery in Beaumont, Texas on January 29 after reaching a final investment decision on its expansion.

The expansion, expected to start up in 2022, will increase the refining capacity at the site by 65% or 250,000 bbl/day, the company said.

Exxon Mobil previously announced that it was planning for the additional unit, which will allow it to process light crude. Most of the refineries on the U.S. Gulf Coast process heavy crude.

But light crude is flowing from the Permian Basin in West Texas at a rapid pace.

“With access to terminals, railways, pipelines and waterways nearby, the Beaumont refinery is strategically positioned to benefit from Permian production growth,” said Bryan Milton, president of ExxonMobil Fuels and Lubricants.